Rotary safety-razor



C. B. COLL|NS. ROTARY SAFETY RAZOR. APPLICATION FILED JULY 27,1918

2 SHEETS-SHEET I.

dttowu Patented Aug 31, 1920 C. B. COLLINS. ROTARY SAFETY RAZOR-APPLICATION FILED JULY 27, I918.

2 SHEETSSHEET 2- ameutoz 0.13. 00' ZZins Patented Aug. 31, 1920.

tional housing.

movement between the housing sections'will t w1th the threaded end ofthe guard support ROTARY Specification of Letters Patent.

SAFETY-RAZOR.

Application filed July 27, 1918. Serial N0.247,064.

To all whom it may concern:

Be it known that -I, CAP BERTRAND Con- LINs, a citizen. of the UnitedStates residing at Sioux Falls, in the county of innehaha and State ofSouth Dakota, have invented certain new and useful Improvements inRotary Safety-Razors, of which the following is a specification.

This invention relates to certain new and useful improvements in rotarysafety razors of the self-contained type, and, among others, has for,itsobjects to provide an improved driving connection between the blade andthe motor whereby the blade may read- ,ily be disconnected for cleaningand renewal; an improved guard for the rotary blade which may beadjusted to vary the cut of the blade to obtain either a coarse, or aclose shave; an improved motor and a sectherefor whereby relativeefi'ect winding of the motor; and means operable exteriorly of thehousing for controlling the speed of and stopping the motor.

In the drawings: Figure 1 is a vertical section through the improvedrotary safety razor, the motor and which is guard support being depictedin elevation;

Fig. 2 is a horizontal section therethrough showing the drivingmechanism in top plan; Fig. 3 is an irregular vertical section on line3-'3 of Fig. 2 showing more in detail the internal construction;

' gig. 4 is a bottom plan view of the motor; an

Fig. 5 is a fragmentary detail perspective view of one of the governorcontrols.

In the embodiment of the invention depicted, the motor 1 is inclosedvwithin a-casing or housing comprising an upper section 2 and a lowersection 3--which sections are relatively rotatable.

The motor is of the coiled spring type, the spring being containedwithin a closed box journaled on the central winding stem composed oftwo telescopic hollow sections 4: and 5, the sections being lockedtogether by a screw 6. This winding stem is journaled at each end in afixed frame 7, the lower end thereof having an extension carrying aratchet 8 and a depending stub 9 stem being on which a socket 10 isthreaded. .The socket is fixedly carried by'the lower housing section 3so that rotating the latter on section 1 will turn the winding stem towind the Patented Au 31, 1920.

spring, a spring pressed pawl 11 being pivoted on the motor supportingframe to hold the ratchet against unwinding.

An internal gear 12 is carried on top of the motor box and meshes with agear 13 fixed on the lower end of a vertical shaft 14. The shaft is'journaled in frame 7 and also in a superposed frame 15, and carries afixed gear 16 on its upper end.

A tubular guard support 17 has its lower flanged end secured to ,themotor frame 7 and is provided above said flanged base with a slot 18through which the teeth of drive gear 16 extend and operate. The upperend of the guard support is externally screw threaded to adjustablyengage a circular guard 19, a lock nut 20 being also engaged forimpinging against the guard and holding 1t in anypredeterminedadjustment.

Within the guard is arranged atubular shaft 21 formed on its lower endwith a peripheral gear 22 the teethof which latter mesh withthose ofdrive gear 16, The upper end of the blade shaft 21 is enlarged to form aperipheral shoulder 23 designed to engagement with a-counter bore in thehead of the blade holder shaft. I

j A stationary center post 31 is disposed within the blade holder shaft,21 and is a concentric formedin its upper end with recess in whichasteln 32 is threaded, said spherical shield 33. The blade clamp 29 isof smaller diameter than, and is entirely recentrally carried'by asomewhat ceived beneath, the shield 33, the latter seembodying a shaft86 i the adjustment of blade rest 27.

, moved from lifted off as a w'ardly out of. mesh with the drive gear.

curing the blade holder in position within the guard support 17. Support17, is braced from the upper end of the casing or housing 2 by anoutwardly extending flange 34, while the" lock nut 20 .has a dependingskirt encircling said upper end to give a finished appearance.v

or the purpose of controlling the speed at which the disk blade isrotated, a governor 35 of the centrifugal type is provided, on which isslidable a brake disk 37 that is slid along the shaft as the weightsrecede through centrifugal force. The governor shaft is journaled in apair of brackets l carriesa worm gear 39 which is drivenfrom the drivegear 16 through a train of speed gears 40. are adapted to bear againstthe governorbrake disk, the former serving as a brake for stopping themotor and ing carried by an actuating member 43 .slidablein a slotformed in the casing 2. Member 42 engages one end of a lever 44 which ispivoted between its ends on the motor frame and has its opposite endturned upwardly tolie between the arms of a forked actuating mem ber 45also slidable in a slot in'the casing. In use, the spring motor is Woundby rotating the lower housing section, whereupon the brake is releasedby slide 43 and the peed of rotation of the cutter determinhd slide 45.The guard is adjusted toward or fromthe blade, de-

pending upon the cut' desired, by releasing locknut 20 and then movingthe guard on its threaded-mounting following which the lock nut is againimpinged against the guard. In order to permit the edge of the blade torest practically in contact with the guard the latter is dished toreceive the To clean the razor or for renewing the blade, the bladesecuring member 33 is reits stationary center postv whereupon the bladeand its holder maybe unit, the gear 22 sliding up;

i e guard may now be cleaned, and by removing the blade clamp 29 theblade may be lifted fro m its rest. To reassemble, it is merely,requisite to replace the blade on its rest, secure it there by itsclamp,drop the blade holder back into the tubular guard support, and positionthe shield or guard 33 on its center post. The gears 21 and 16 willautomatically mesh with. one another without any special operation andare readily separableon lifting out the blade holder unit. I L i Whatis'claimed is: 7

n a rotary razor, a casing, a post therein, blade drlving means arrangedadjacent said post, a blade carrier rotatably and slidably receivableover the post and en- 38, on the motor frame, and

spring motor, a housing A pair of friction shoes 41 and 42 the motor andemb ,an inwardly extending bifurcated through K I variable I spacebetween same and disengagement of casing, abladecarrier' rotatably andslid on the post, means to rotate ably mounted the 'post, and a shieldoverthe carrier on lying the carrier and blade andhavinq removableengagement with the post to hold thecarrier against sliding on the postand to allow removal of the carrier from the post. p

3 A rotary safety razor including a therefor, a frame fixed to thehousing and rotatably supporting the motor, a speed governor mountedonthe frame in operative connection with odyinga centrifugallyweight-operated disk, 'a lever pivoted betweemits ends on the frame andcarrying a brake shoe on one end for variablepressure on the disk, and aA- rotary safety razor including a supporting the motor,

connecting the companion housing section to the winding stem of themotor, a speed governormoun'ted. on .the frame in operative connectionwith the motor and embodying a centrifugally weight-operated disk, alever pivoted between its endson the frame and carrying a brakeshoe onone end for pressure on the disk, a, controlling member slidably mounted,on the upper housing section and having an end of the lever forswinging the latter to apply the shoe and vary the speed of the motor,and a second control-member v slidably carried by the upperhous'ingsection and having an inwardly extending brake shoe engaging the diskand stopping the motor. 7 ,2 5. In a rotary razor, a casing, bladedriving means therein, a bla ab y connected to said driving means, aguard underlying the blade, means to adjust the guard to increase ordecrease the overlying, the blade and v disengagement of the bladecarrier, from said driving means, and means whereby to secure saidshield relative to the casing and to allow of removal the carrier fromsaid drivng means.

6. A rotary safety razor including a houscontrolling member slid- I thehousing and having d in the upper housing section thereof so as.t'opcrmit swinging the latter vto apply the shoe and, vary the speedofthe motor.

inwardly ex tending bifurcated part straddling-the other .110;

de carrier detach= the blade, a shield 1 acting to prevent i ing, adrive gear journaled therein, a blade guard, a sleeve support carryingthe guard at one end and having'its opposite end porgear projects,

tion formed with a slot through which the and a rotary blade carryingshaft removably disposed within the sleeve support and provided with agear on its inner end for meshing with the drive gear;

rigidly mount the shield, and means to rodrive means therein including agear,

tate the blade relative to the shield.

8. In a rotary razor, a blade carrier, drivthe earner, means to allowing means for the carrier to be engaged with and disengaged againstslidingf while permitting free rotation thereof.

9. In a rotary safety razor, a housing,

atubular guard support threaded at'its outer end, a blade guard engagedwith the threads thereof for adjustment, means for locking the guard inits adjusted position, a rotary blade superposed on the guard, and ablade supporting shaft j ournaled in the tubular support and carrying agear on its inner end for meshing with the drive gear. a Y 10. Inarotary safety razor, a rotary blade holder, drive means, and adetachable connection between the two including separable gears.

spring motor, an upper housing, a lower means having housing connectedthereto, means to support the motor from one of the housings whereby onrotating the other of said houswound, and a cutter operable by themotor.

12. A rotary safety razor including a tubular guard support, a guardcarried thereby and adjustable longitudinally t eof, a rotary bladearranged above the means passing for rotating the blade.

-13. A rotary safety 'razor including a guard, a hollow supporttherefor, drive A rotary safety razor including a uard, .and through thetubular support" and a blade-clamp detachably engaged with the shaft andengaging over the blade.

- 15.:In a rotary safety razor, a center 'ost,

a blade holder comprising a hollow sha recarrying a flat blade ceivingthe post and the rest and rest on its upper end, a blade on a clamp'superposed'on the blade and formed with a tubular shank passingcentrally through the blade for engaging the shaft, a support, drivemeans carried thereby including a wheel engaging the lower end of theshaft, a guard carried by the support iel s beneath the blade, and a shecured to the center post and extending over the blade clamp for lockingthe blade holder in posi-.

means,

tion. a 16. In a rotary safety razor, driving a circular cutter, meansto support the cutteiymeans to drive the cutter supportfrom the drivingmeans by sliding thereof, and means to hold the carrier means having agear wheel extending into the support, a blade holder embodylng a shaftinsertible in the hollow support and carrying a gear on its lower endfor meshing with the'gear wheel, means for securing the holder inposition,

holder.

and a blade carried by its blade holder embodying a sections, tion, apawl engaged with the'ratchet and ing means from said driving means, andmeans whereby'to allow the cutter supporting means to be engaged withand disengaged from the driving means by a mere lifting movement of thecutter supporting means.

17 In a rotary razor, a blade carrier, meansto slidably support thecarrier, drivin means for the carrier,means to allow the carrierto beengaged with and disengaged from the driving means by sliding thereof,

and means detachably connected to the carrier supporting means forholding the carrier a ainst sliding. 4

18 n a rotarysafety razor, a rotary blade holder, a. drive slidablyconnected therewith, and detachable means to prevent sliding of theblade holder so that upon detachment by sliding thereof. f

19. In a rotary safety razor, a casing composed of a lower and asuperposed upper section formed to overlap, one another, a winding motorcarried by one of the sections, said sections being capable of relativerotation, acircular disk blade carried by the upper section, means todrive said blade from the the holder may be removed from the drivemotor, and meansto-effect winding of the:

.posed of a lower and a superposed upper section a winding motor carriedby one of the a ratchetcarried by the other seecarried by "said firstsection, a circular disk blade carried by the upper section, means todrive said blade from the motor, and'means to allow of relative rotationof the sections whereby upon rotation the motor will be wound. w

21. In a rotary razor,.the combination of a hollow handle, astationarycircular peripherally-toothed guard fixed'to said handle, anexternally-convex stationary face-plate fixed to said handle and havinga smooth outer face-engaging surface, a mechanical -motor in saidhandlq'and a rotary circular disk blacle between said stationary guardand stationary face-plateand revolved bysaid motor,

5 22. In at rotary razor of the oharaeter de-i scribed, the combinationof a hollow handle ofgenemkpear shape of an upper means to wind 'saldmotor by turning one of the, handle sections relatively .to the 10other, a circular rotary disk blade, and

means for revolving such blade by the motor. In testimon whepeof I afilxm si ature.

C BERTRAND G INS. v

